<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
    #box{
      width: 100px;
      height: 100px;
      background-color: rebeccapurple;
      margin: 50px;
      transition:all 500ms linear;
    }
  </style>
</head>
<body>
  <div id="box">

  </div>
  <script>
  var box=document.getElementById('box');
  box.onclick=function(){
    box.style.transform='translate(300px,300px)';
    box.style.backgroundColor='green';
  }
  </script>
</body>
</html>